Hacksaw.



J. S. DIKEMAN.

HAGKSAW.

APPLIUATION II-LED SEPT. 18, 1912.

UNITED sTA Tns inrnNT ormCE.

JosErI-I s. DIKENAN, or fNbawALK, CONNECTICUT, AssroNon To THE DIKEMAN MANUFACTURING COMPANmmF NORWALK, CONNECTICUT.

HACKSAW.

To all whom zt may concern Be it known that I, JOSEPH S. DIKEMAN, a citi;J en of the United States, residing at Norwalk, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Haclzsaws; and ,I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appert-ains to make and use thesame.

'My invention relates to an improvement in hack saws, and particularly those in which the frame is made of two parts and is extensible, and it consists in improved means in'locling the two members of the frame together. In the accompanying drawings, Figure 1 is a view in side elevation of my improved saw, showing the two parts in their normal or locked position. Fig. 2 is a view showing the floating rivet at the lower end of the slot. Fig. 3 is a viewin section onthe line wof Fig. 1 and Fig. 4 is a similar vie-w in section through Fig. 2. I

The saw frame is of the U-shape extensible type, and comprises the section A1 and the handle end or section 2, the former of which is provided with a flattened sleeve or coupling 3, riveted or otherwise rigidly secured to the same. This sleeve or coupling' 3 is preferably open. at the bottom, as shown, and is of a size sufficient internally to receive and permit of the free movement of the telescopi'ng end of handle section 2 of the frame.

In saws of this type now in use, the sleeve or coupling 3, is provided with recesses or holes to receive a tooth or projection carried by section 2 at or near the free end of the latter, lfor lockingvthe section against longitudinal movement, hence in order lengthen or shorten the sawframe, it 1s necessary to disengage the tooth from the recess or hole .in the coupling, and this can only be done by turning section 2 at an angie until thetooth disengaged from its recess 1n the sleeve -or coupling,` and then moving the sections while in this angular position until the desired adjustment has been reached, and then by straightening out the sections, the tooth enters its notch in the sleeve or coupling and locks the two sections together. In the present instance I enlarge Specification of Letters Patent.

-Patented Nov. 12, 1912.

Application led September 18, 1912. Serial No. ff21,038.

the free ends of the sleeve o-r coupling 3, as shown at el, and provide the enlargements with the inclined slots 5 in which is loosely mounted the floating rivet 6.' This rivet normally rests at the bottomof the slots, and when so located, the space between the rivet and the inner top surface of the sleeve or coupling is ample to permit of the free 'longitudinal movement of the section 2 of the frame without any angular movement of either section. Handle section 2 of the frame is provided on its underside with a series of curved notches 7 which form seats for the floating rivet 6. After the sect-ions have been adjusted, the weight of section 2, causes it to drop onto the rivet, and by pushing endwise on section 2,' the engagement of the rivet with the ,curved notch 7 inthe lower edge of section 2, causes the rivet to ride up the inclined slot until stopped by the engagement of the upper edge of section 2 of the frame with the inner wall of the top of the sleeve or coupling, hence so long as there is any endwise pressure or pull on sect-ion 2, as there always is when a saw blade issecured to both sections l and 2, the two sections will be locked tog-ether against the possibility of" separation. By releasing the tension on the saw blade, the weight of section 2 of the frame will cause the floating' rivet 6 to drop and thus lea-ve section 2 of the frame free tobe slightly elevated and adjusted.

When the saw blade is tightened up, the float-ing rivet 6 slides up the inclined plane,

' until the section 2 oft-he frame has a bearing throughout its entire length against the top wall of the coupling, thus making the connection or lock-between the two sections extra` strong and' rigid.

It is evident that many slight changes ing` rivet mounted in an elongated slot in said coupling and adapted to'engage a notch in the other section.

l 2. A hack saw frame made in two sections 5 one-'of which has a hollow coupling to receive an end of the other section, the said hollow coupling having an elongated inclined slot` ande; l-rivet mounted in said elongated slot and adapted to lengage a notch in vone edge of-the other section of the frame.

3. A hack saw frame made 1n two sections one of which has a hollow coupling to receive [an end of theother section, the said coupling having elongatedv inclined slots in its side walls *and arivet mounted to move in said slot, the space .between the rivet when the latter is at thebottoni of the slots, andthe top wall of the coupling being suicient lfor the free movement of the otherl or handle end section of the frame, the said handle 20 JOSEPH s. DIKEMAN.

Titnessee .z

JAMES PAUL, A. DWIGHT KEEP. 

